Circular loom for weaving of hose



July 11, 1950 c. CHRISTIANSEN 5pm. 2,514,842

CIRCULAR LOOMFOR'WEAVING 0F HOSE Filed June 3, 1946 lllllllllllllllllllllllllllllllllllllli MEIR-dim v- 8 warm 6%, W05

Patented July 11, 1950 UNITED STATE s PATENT oFFI'cE CIRCULAR LOOM FORWEAVING F HosE l Christian Christiansen, Lille Foren, V. Aker, nearOslo, and Gustav Otto Karl Riisch, Mandal,

Norway Application June 3, 1946, Serial No. 674,091 In Norway October27, 1943, y l

Section 1, Public Law 690, August 8, 1946 Patent expires October 27,1963 i 1 The present invention relates to circular looms warp threads toa high degree, and at the same time to tighten the weft threads to theutmost in order to draw the weaving tightly together.

Further, it was necessary to twist both the warp threads and the weftthreads very hard in. order to prevent them from failin under the heavyload. All this involved the disadvantage that the hose became'very hardand stiff, especially in wet condition.

The object of the present invention is to provide an improved circularloom by means of which it is possible to weave hoses which are tighteven under very high pressure, and which at the same time are soft andflexible;

According to this invention, in addition to the sector, a furtherpressing organ, a so-called press finger, is also arranged on the sectorcarrier. This press fingerj comes into action at a point where the angleor opening between the warp threads induced by the sector carrier due toits form, is larger than at the point where the sector itself comes intoaction. The heddle action in this instance is similar to that commonlyemployed with circular looms, being similar, for example, to thatdescribed in U. S. Patent No. 2,353,387 to Duncan Edward Farmar Canney,dated July 11, 1944. The shifting of the heddles occurs with respect tothe movement of the sector carrier so that the shifting is virtuallycompleted before the trailing edge of the sector carrier leaves theshed, and the shedding is, in effect, completed by the movement of thetrailing end of the sector carrier out of the shed. The press finger oneach sector carrier will then press the warp threads firmly against theweft thread which is laid in by the preceding sector,

the shifting of the heddles having taken place before the press fingercomes into action, whereby the whole weft is made tighter. Further, the

press finger will force the warp threads somewhatv apart, so that thefollowing sector will more easily bring the weft thread fully into thecrossing point of the warp threads. By this means a much closer pressingtogether of all threads is obtained, and, as experience has shown,

1 Claim. (Cl. 139-13) the same tightness of the hose may be obtainedwith 20-30 per cent less twisting of both weft and warp threads thanpreviously necessary. At the same time the load of all threads mayhere-- duced up to 50 per cent. The weight of the hose can thus bereduced by about 10 per cent. Owing to the small load of the threads,the hose also becomes quite soft even in wet condition, and the lessertwisting of the threads has the effect that the hose, when becoming wet,swells and therefore becomes tight very quickly.

The press finger may be wedge shaped with a thickness considerablygreater than the thickness of the sector and preferably made with aplane horizontal part with which it rests against the upper edge of theweaving ring.

The drawing shows an example of an embodiment of a sector carrier withsector and with a press finger according to the invention. Fig. 1 showsthe sector carrier looking from above and Fig. 2 a side elevationlooking from the side facing the weaving ring. Figure 3 showsdiagrammatically the two thread systems together with the sector carrierwith sectors and the weaving ring.

l is the sector carrier on which is arranged the sector 2 and the pressfinger 3, both acting above the upper edge 4 of a usual weaving ring 5which is shown in dotted lines.

The press finger 3 comes into action at a point where the angle oropening between the warp threads is larger than at the point where thesector 2 acts, owing to the fact that the plate of the sector carrierforces the uppermost and the lower warp threads from each other. Thepress finger is fastened to the sector carrier partly by the screw 6,partly by the screw I screwed into the sector, and has a part B whichpresses the shedded warp threads firmly against the weft threadspreviously laid in. This part 8 is, as shown in Fig. 2, considerablythicker than the sector and preferably made with a wedge formed sectionwith a plane lower surface resting against or rotating immediately abovethe upper edge 4 of the weaving ring. 9 is a guard preventing thethreads from catching the screw 6.

I0 is the weft thread which is passed around guiding pins ll, around thetension controlling device l2 and over the roller or pin [3 to theweaving ring.

l4 and 14' indicate the warp threads which are passed from the bobbinsl5, I5 through the guides H5 over the guide rods H and I8 and throughknown heddles l9, I9 to the weaving ring 5, at the upper edge of whichthe weaving takes place by laying in of the weft threads, the woven hose24 being pulled, by known means, downward through the Weaving ring andthe tube 25 carrying the same. The guides 16 as well as the guide rodsI1 and 8 are, in the known manner, bent in a circle concentric with theweaving ring. In order to tension the warp threads each thread, betweenthe guide rods 11 and I8, is loaded with a weight 20 having a hookengaging the thread.

Each bobbin 22 with the weft thread H! is mounted on a rotating sledgeon which also the sector carrier 1 with the sector is arranged, as

tate about said ring, a sector mounted on said carrier for pressing aweft thread inwardly betweenthe warp threads, a separate press fingerhaving a greater thickness than said sector mounted on said sectorcarrier and adapted to press the Warp threads firmly against the Weftthread previously laid in, the pressing surface of said finger being anarcuate section concentric with said weaving ring, and said fingerhaving a plane bottom surface disposed immediately above the top edge ofsaid weaving ring to firmly press the lowermost warp threads against thesaid top edge of the weaving ring.

CHRISTIAN CI-IRISTIANSlEiN.

GUSTAV OTTO KARL RUSCH.

REFERENCES CITED The following references are of record in the 'file ofthis patent:

UNITED STATES PATENTS Number Name Date 361,994 De Laski Apr. 26, 1887446,085 Stowe Feb. 10, 1891 2,398,956 Pelee Apr. 23, 1946 FOREIGNPATENTS Number Country Date 1,356 Great Britain 1853 70,896 Norway, Aug.19, 1946

